package ebook.thinking.chapter21.stopthread;

import java.util.concurrent.TimeUnit;

/**
 * Created by Administrator on 2016/4/5.
 */
public class InterruptingIdiom {
    public static void main(String[] args) throws InterruptedException {
//        if(args.length != 1){
//            System.out.println("usage:  java InterruptingIdiom delay-in-mS");
//            System.exit(1);
//        }
        Thread t = new Thread(new Blocked3());
        t.start();
        TimeUnit.MILLISECONDS.sleep((new Integer("10000")));
        t.interrupt();
    }
}

class NeedsCleanup
{
    private final int id;

    public NeedsCleanup(int id) {
        this.id = id;
        System.out.println("NeedsCleanup " + id);
    }
    public void cleanup(){
        System.out.println("Cleaning up " + id);
    }
}

class Blocked3 implements Runnable{
    private volatile double d = 0.0;
    @Override
    public void run() {
        try{
            while(!Thread.interrupted()){
                NeedsCleanup n1 = new NeedsCleanup(1);
                try{
                    System.out.println("Sleeping");
                    TimeUnit.SECONDS.sleep(1);
                    NeedsCleanup n2 = new NeedsCleanup(2);
                    try{
                        System.out.println("Calculating");
                        for (int i = 0; i < 2500000; i++) {
                            d = d + (Math.PI + Math.E) / d;
                        }
                        System.out.println("Finished time-consumed operation.");
                    }finally {
                        n2.cleanup();
                    }
                } finally {
                    n1.cleanup();
                }
            }
            System.out.println("Exiting via while() test");
        }catch (InterruptedException e) {
            System.out.println("Exiting via InterruptedException");
        }
    }
}
